On October 4th, ten days after he testified, Joshua Brown was shot several times in the parking lot of his apartment complex. Brown died after being taken to Parkland Memorial Hospital. He was the key-witness in the Amber Guyger murder trial, as the neighbor of the victim. The timing of Brown's death has raised public speculation about whether the shooting was tied to his testimony. Currently, there are three suspects connected to his death. All three suspects came from Alexandria, La., to purchase drugs from Brown. Police said when they searched Brown's apartment, they confiscated 12 pounds of marijuana, 143 grams of THC cartridges and $4,000 in cash.

https://www.dallasnews.com/news/2019/10/08/dallas-police-name-three-suspects-joshua-brown-murder-investigation/